package com.yunshang.shoppingmall.common.weixin;

import java.math.BigDecimal;

public class AmountUtils {


        /** 金额为分的格式 */
        public static final String CURRENCY_FEN_REGEX = "\\-?[0-9]+";


        /**
         * 将分为单位的转换为元并返回金额格式的字符串 （除100）
         *
         * @param amount
         * @return
         * @throws Exception
         */
        public static String changeF2Y(Long amount) throws Exception {
            if (!amount.toString().matches(CURRENCY_FEN_REGEX)) {
                throw new Exception("金额格式有误");
            }


            int flag = 0;
            String amString = amount.toString();
            if (amString.charAt(0) == '-') {
                flag = 1;
                amString = amString.substring(1);
            }
            StringBuffer result = new StringBuffer();
            if (amString.length() == 1) {
                result.append("0.0").append(amString);
            } else if (amString.length() == 2) {
                result.append("0.").append(amString);
            } else {
                String intString = amString.substring(0, amString.length() - 2);
                for (int i = 1; i <= intString.length(); i++) {
                    if ((i - 1) % 3 == 0 && i != 1) {
                        result.append(",");
                    }
                    result.append(intString.substring(intString.length() - i, intString.length() - i + 1));
                }
                result.reverse().append(".").append(amString.substring(amString.length() - 2));
            }
            if (flag == 1) {
                return "-" + result.toString();
            } else {
                return result.toString();
            }
        }


        /**
         * 将分为单位的转换为元 （除100）
         *
         * @param amount
         * @return
         * @throws Exception
         */
        public static String changeF2Y(String amount) throws Exception {
            if (!amount.matches(CURRENCY_FEN_REGEX)) {
                throw new Exception("金额格式有误");
            }
            return BigDecimal.valueOf(Long.valueOf(amount)).divide(new BigDecimal(100)).toString();
        }


        /**
         * 将元为单位的转换为分 （乘100）
         *
         * @param amount
         * @return
         */
        public static String changeY2F(Long amount) {
            return BigDecimal.valueOf(amount).multiply(new BigDecimal(100)).toString();
        }


        /**
         * 将元为单位的转换为分 替换小数点，支持以逗号区分的金额
         *
         * @param amount
         * @return
         */
        public static String changeY2F(String amount) {
            String currency = amount.replaceAll("\\$|\\￥|\\,", ""); // 处理包含, ￥
            // 或者$的金额
            int index = currency.indexOf(".");
            int length = currency.length();
            Long amLong = 0l;
            if (index == -1) {
                amLong = Long.valueOf(currency + "00");
            } else if (length - index >= 3) {
                amLong = Long.valueOf((currency.substring(0, index + 3)).replace(".", ""));
            } else if (length - index == 2) {
                amLong = Long.valueOf((currency.substring(0, index + 2)).replace(".", "") + 0);
            } else {
                amLong = Long.valueOf((currency.substring(0, index + 1)).replace(".", "") + "00");
            }
            return amLong.toString();
        }


        public static void main(String[] args) {
            // try {
            // System.out.println("结果："+changeF2Y("-000a00"));
            // } catch(Exception e){
            // System.out.println("----------->>>"+e.getMessage());
            //// return e.getErrorCode();
            // }
            // System.out.println("结果："+changeY2F("1.00000000001E10"));


            System.out.println("元-分==" + AmountUtils.changeY2F("1.33"));
            try {
                System.out.println("分-元==" + AmountUtils.changeF2Y("1322"));
            } catch (Exception e) {
                e.printStackTrace();
            }
            // System.out.println(Long.parseLong(AmountUtils.changeY2F("1000000000000000")));
            // System.out.println(Integer.parseInt(AmountUtils.changeY2F("10000000")));
            // System.out.println(Integer.MIN_VALUE);
            // long a = 0;
            // System.out.println(a);


        }
    }

